Opening a private window takes a second - also stutters

Description of the issue: When you press Ctrl + Shift + N, the private window doesn’t open instantaneously, it takes a second. Also putting a private window on a different virtual desktop, makes it lag and stutter - if you drag that window back to the main desktop on top of the regular window opened, it works completely fine.

How can this issue be reproduced?

  1. Open Brave normally
  2. Press “New Private Window” or Ctrl+Shift+N
  3. Open a video on YouTube on main normal window (1080p60fps specifically)
  4. Drag Private Window to a different virtual desktop. Open several tabs and try navigating normally.

Expected result: Private window should open instantly and also not log on usage on a different virtual desktop.

Brave Version( check About Brave): Brave 1.79.126 (Official Build) (64-bit)

Additional Information:
I am currently on almost the latest version of EndeavourOS, will update the system Sunday night as I always do, however, I have noticed this behavior since a while ago and it was even 1.78 version of Brave (or the previous 1.79.xxx). Edit: I forgot to say I am on Wayland, but I also tried X11 and it didn’t make any difference.
DE is KDE, current version 6.3.5 - I suppose it’ll turn 6.4 on Sunday when I update.
Things I have tried:

  • Simply reinstalling Brave (yay -Rs brave-bin and then yay brave-bin)
  • Removing Brave with -Rns command as well as manually deleting the complete user data (I was trying to make sure that everything got deleted and not built from leftover files) - I also tried to reinstall with cleanBuild on yay.
  • Tried different browser to make sure it was or wasn’t just Brave. All the other browsers were completely normal - these included Firefox, Vivaldi, Falkon and Konqueror (lol).

I have tried to replicate the issue again. It seems sites with a lot of pictures or media affects it the most, and if you remain “still” for a moment and then try to scroll again or use the window, it stutters/lags. I hope this is noticeable on the clip I recorded here on THIS LINK

Thank you very much.